Molekula
Ponceau S (C.I.27195)
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Certificate of Analysis with every batch
Ponceau S (C.I.27195) is a bright red azo dye widely used as a pH indicator in biochemical assays, food coloring (E124), and histological staining. It changes color in acidic and alkaline conditions, making it valuable for protein detection in gels and analytical applications. CAS 6226-79-5, molecular formula C22H12N4Na4O13S4, molar mass 760.57 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Ponceau S from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Ponceau S (C.I.27195) is a bright red azo dye widely used as a pH indicator in biochemical assays, food coloring (E124), and histological staining. It changes color in acidic and alkaline conditions, making it valuable for protein detection in gels and analytical applications. CAS 6226-79-5, molecular formula C22H12N4Na4O13S4, molar mass 760.57 g/mol. Store at ambient temperature. Signal word: Warning. Molekula supplies Ponceau S from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | Dark Red or brown powder |
| Solubility in water | Soluble in water |
| Dye content (by spectrophotometry) | ≥ 75.0 % |
| Loss on drying (110 °C) | ≤ 10.0 % |
| Absorption maximum in water | 517 - 523 nm |
| Specific absorptivity 1%/1cm (at λmax) | > 460 |
| Suitability for electrophoresis | Passes test |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 43797916 |
| CAS Number | 6226-79-5 |
| Molecular Formula | C22H12N4Na4O13S4 |
| Molecular Weight | 760.57 |
| SMILES | C1=CC(=CC=C1N=NC2=CC(=C(C=C2)N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+] |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Hungarian, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Ponceau S (C.I. 27195) commonly used for?
Ponceau S is primarily used as a red azo dye in food, pharmaceuticals, and cosmetics, as well as a biological stain in laboratories.
What is the chemical formula and molecular weight of Ponceau S?
The chemical formula is **C₂₂H₁₂N₄Na₄O₁₃S₄**, and the molecular weight is **760.57 g/mol**.
How should Ponceau S be stored?
Store Ponceau S at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What grade or purity is available for Ponceau S from Molekula?
Molekula supplies **analytical grade** and **food-grade (certified for use in food applications)** Ponceau S, depending on requirements.
Can Molekula supply Ponceau S in bulk quantities?
Yes, Molekula can provide Ponceau S in **bulk quantities**, with packaging options tailored to your needs—contact us for specific volumes.
What documentation is provided with an order of Ponceau S?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.